Island



( Model.)

PRESSER FOOT ATTACHMENT FOR SEWING MACHINES. No. 523,827. Patented July31, 1894.

/N VENTOR A TTORNEYS.

WITNESSES NITED STATES PATENT I FFICE.

FERDINAND B. ALMY, F PROVIDENCE, RHODE ISLAND.

PRESSER-FOOT ATTACHMENT FOR SEWING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 523,827, dated July 31,1894. Application filed July 19, 1893. Serial No. 480,892- (Model) Toall whom it may concern.-

Be it known that I, FERDINAND B. ALMY, of-

Providence, in the county of Providence and State of Rhode Island, haveinvented a new and Improved Presser-Foot Attachment for Sewing-Machines,of which the following is a full, clear, and exact description.

The invention relates to a presser foot attachment for sewing machines,said attach- 1 o ment being similar in operation to the presser footshown and described in the Letters Pat. ent of the United States No.419,303, granted to me under date of January 14, 1890. The object of thepresent invention is to provide an attachmentsimilar in operation to mypatented presser foot, that will be capable of being secured to'presserfeet of various widths and thicknesses, and will thus enable a presserfoot of any of the usual patterns to perform the same function as myabove mentioned patented presser foot.

The invention consists principally of an ad justable clamping devicewhereby the attachment may be secured to a presser foot, and a too whichis adjustably connected with the said clamping device. 7

The invention also consists of certain parts and details andcombinations of the same, as will be hereinafter described and thenpointed out in the claims.

Reference is to be had to the accompanying drawings, forming a part ofthis specification, in which similar letters of reference indicatecorresponding parts in all the figures.

Figure 1 is a perspective View of the improvement as applied. Fig. 2 isa rear side elevation of the same with parts broken out. Fig. 3 is anend elevation of the same; and Fig. 4 is a transverse section of part ofthe 0 improvement as applied.

-In the drawings, I have represented a presser bar A carrying onits'lower end a presser foot 13 bifurcated at its forward end to formthe two rigid prongs B and B between which passes the needle ofthesewing machine.

The attachment consists primarily of a shoe sponding part at the rearend thereof, as plainly illustrated in the drawings.

The top of the presser foot B in the rear of the prongs B and B isadapted to be en-' ing with its other end on the arm 0', as will bereadily understood by reference to Figs. 2 and 3. The parts G, D, E, F,G, constitute a clamp with which is adj ustably connected the toe H tobe described presently. The clamp is capable of being attached topresserfeet of different thicknesses, as the screw D and the arm E arecapable of moving toward and from the shoe 0, and the spring G willcause the presser foot to be firmly clamped between the shoe 0 and thescrew D. The clamp is also adapted for attachment to presser feet ofdifferent widths, by screwing the screw D farther into the armE orunscrewing it therefrom, as required, it being understood that thepresser foot is also clamped between the arm E and the head of thescrew. It will be further understood that the presser foot proper doesnot come in contact with the material'and does not perform its usualfunction except in regard to the guidance of the needle, but thisfunction is performed by the shoe 0 as will be seen in the drawings.

On the threaded end of the spindle F screws a toe H extending forwardlyand adapted to engage, with its inner face, the outer edge of thedoubled up part of the material, as plainly illustrated in Figs. 1 and4., The rear end of the toe H is adapted to engage the transverse arm 0'whereby the pivotal movement of the toe on the spindle is limited. Now,by turning the spindle F in its bearings in the shoe 0, the toe H ismoved transversely, either toward or from the presser foot according tothe direction in which the said spindle F is turned. By thisarrangement, the distance between the needle and the toe H can beincreased or diminished according to the amount of material throughwhich the needle is to pass at the doubled-up portion; it beingunderstood that the amount varies according to the thickness of thematerial under treatment.

It is understood that the needle passes through the doubled-up edge ofthe material a suitable distance from the outer edge thereof, thisdistance varying according to the thickness of the material undertreatment. Now, to bring the needle into the proper position, relativeto the outer edge of the doubled-up portion of the material, I use thetoe H, which is laterally adjusted by the spindle F according torequirements.

The lateral adjustment of the toel-I is necessary, for if it is desiredto have the needle pass through a greater amount of material at thefolded inner end of the material, as is required when a thicker materialis used, then the said toe may be set farther away from theneedle so asto enable the needle to take a greater bite in the cloth; and whenthinner goods are used, the toe must be set closer to the needle toprevent the needle from taking too deep a bite as to show the stitch onthe fair side of the blind seam.

It is understood that the spindle F also 1 forms the fulcrum for the toeH. On the threaded end of the spindle F screws a collar F facing thefront side of the shoe 0 to hold the spindle F securely in its bearingswhen the spindle is turned to move the toe H to its proper position.

Having thus described my invention, I claim as new and desire to secureby Letters Patent- 1. A presser foot attachment for sewing machines,comprising a clamp consisting essentially of two parts pivoted to eachother, and a spring for forcing the members of the clamp toward oneanother, and an adjustable toe having guided movement along one of the oclamp members transversely of the clamp, as and for the purpose setforth.

2. A presser foot attachment for sewing machines, comprising a clampconsisting essentially of two parts, a screw spindle forming apivot't'or the said parts, and a spring for forcing the members of theclamp toward one another, and a toe connected with the said screwspindle, and having guided movement transversely of the clamp foradjustment in relation thereto, as and for the purpose set forth.

3. A- presser foot attachment for sewing machines, comprising a clampconsisting essentially of two parts, a screw spindle having a smoothportion passing loosely through the i said parts and forming a pivottherefor; and i a spring for forcing themembersof theclamp toward eachother, means for preventing a longitudinal movement of the screwspindle, f and a toe adapted to screw on the said spindle, so as to beadjustable transversely of the clamp, as and for the purpose set forth.

4. A presser foot attachment for" sewing machineacomprising a shoeadapted to fit {under the presser foot, a springcontr'ol1ed i arm havinga lateral extension adapted to exert a downward pressure on the top ofthe 1 presser foot, a screw spindle passing through 1 the shoe andforming a pivot for the said arm, }and a toe screwing 'on the spindlewhich latter also forms a fulcrum for the said toe, sub- }stantially asdescribed.

FERDINAND B. ALMY.

Witnesses:

ANNIE M. ALMY, WALTER B. OROWELL.

